VPR221SZ (Z-Foil) Vishay Foil Resistors

Transcription

1 Ultra High Precision Bulk Metal Z-Foil Surface Mount Power Resistor in TO-220 Configuration with TCR of ± 0.05 ppm/ C, PCR of 4 ppm/w and Load Life Stability of ± % (50 ppm) INTRODUCTION The Z-Foil technology provides a significant reduction of the resistive component s sensitivity to ambient temperature variations (TCR) and applied power changes (PCR). Model VPR221SZ is a 4 lead kelvin connected surface mount device which provides high rated power, excellent load life stability, low temperature coefficient (TCR) and low power coefficient (PCR) - all in one resistor. ± 0.05 ppm/ C absolute TCR removes error due to temperature gradients. By taking advantage of the overall stability and reliability of Bulk Metal Z-Foil resistors, designers can significantly reduce circuit errors and greatly improve overall circuit performances. Our application engineering department is available to advise and make recommendations. For non-standard technical requirements and special applications, please contact us. FEATURES Temperature coefficient of resistance (TCR): ± 0.05 ppm/ C typical (0 C to + 60 C) ± 0.2 ppm/ C typical (- 55 C to C, + 25 C ref.) (see table 1) Tolerance: to ± 0.01 % Power coefficient R due to self heating : 4 ppm/w typical Rated power: 8 W chassis mounted (MIL-PRF-39009) Load life stability: to ± % at 25 C for 2000 h, at 1.5 W Resistance range: 0.5 to 500 Foil resistors are not restricted to standard values; specific as requested values can be supplied at no extra cost or delivery (e.g. 100R2345 vs. 100R) Electrostatic discharge (ESD) up to V Short time overload % (10 ppm) Non-inductive, non-capacitive design Rise time: 1 ns effectively no ringing Current noise: µv RMS /V of applied voltage (< - 40 db) Thermal EMF: 0.05 µv/ C typical Voltage coefficient < 0.1 ppm/v Non-inductive: < 0.08 µh Non hot spot design Thermal stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value) Terminal finish: lead (Pb)-free or tin/lead alloy Compliant to RoHS directive 2002/95/EC Prototype quantities available in just 5 working days or sooner. For more information, please contact foil@vishaypg.com For better performances please contact us FIGURE 1 - SCHEMATICS I R I I 1 E 1 E 2 I 2 TABLE 1 - TCR AND TOLERANCE RESISTANCE RANGE ( ) TIGHTEST RESISTANCE TOLERANCE TYPICAL TCR AND MAX. SPREAD (1) FIGURE 2 - POWER DERATING CURVE - 55 C 100 V 0.5 to < 1 ± 0.05 % ± 0.2 ppm/ C ± 2.8 ppm/ C 1 to < 10 ± 0.02 % ± 0.2 ppm/ C ± 2.3 ppm/ C 10 to 500 ± 0.01 % ± 0.2 ppm/ C ± 1.8 ppm/ C Notes (1) MIL-range (- 55 C to C, + 25 C ref.) Contact applications engineering for other available values * Pb containing terminations are not RoHS compliant, exemptions may apply P e r c e n t o f R a t e d P o w e r Ambient Temperature ( C) Document Number: For any questions, contact: foil@vishaypg.com Revision: 16-Aug-12 1

2 VPR221SZ (Z-Foil) FIGURE 3 - TRIMMING TO VALUES (conceptual illustration) FIGURE 4 - TYPICAL RESISTANCE/ TEMPERATURE CURVE (for more details see table 1) TCR Chord Slopes for Different Temperature Ranges Interloop Capacitance Reduction in Series Mutual Inductance Reduction due to Opposing Current in Adjacent Lines Note: Foil shown in black, etched spaces in white Current Path Before Trimming Current Path After Trimming Trimming Process Removes this Material from Shorting Strip Area Changing Current Path and Increasing Resistance ΔR R 0 (ppm) ppm/ C ppm/ C 0.1 ppm/ C 0.14 ppm/ C ppm/ C 0.2 ppm/ C Ambient Temperature ( C) FIGURE 5 - VPR221SZ FORMING DIMENSIONS in inches (millimeters) ± (3.81 ± 0.20) (9.27) Ref. Before Forming ± (17.65 ± 0.25) (2.286) Ref ± (0.38 ± 0.05) ± (1.98 ± 0.13) (2.79) Ref. FIGURE 6 - VPR221SZ DIMENSIONS in inches (millimeters) ± (6.22 ± 0.25) ± (5.08 ± 0.76) ± (13.72 ± 1.02) ± (10.16 ± 0.25) VFR VPR221SZ 1R0 1 % ± (3.81 ± 0.20) ± (2.92 ± 0.13) ± Dia. (3.58 ± 0.13) ± (0.76 ± 0.05) Max. (15.62) ± (0.38 ± 0.05) Heat Sink After Forming ± (2.29 ± 0.25) Flush with Heat Sink Within ± (± 0.05) I 1 E 1 E 2 I ± (2.54 ± 0.13) ± (1.98 ± 0.13) FIGURE 7 - LAND PATTERN DIMENSIONS in inches (millimeters) ± (1.27 ± 0.25) ± (3.05 ± 0.25) 0.10 ± (2.54 ± 0.12) For any questions, contact: foil@vishaypg.com Document Number: Revision: 16-Aug-12

3 TABLE 2 - SPECIFICATIONS Power Rating at + 25 C Current Noise High Frequency Operation Rise Time Inductance (L) (3) Capacitance (C) Voltage Coefficient (4) 8 W or 3 A (1) on heat sink (2) 1.5 W in free air Further derating not necessary. < µv RMS /V of applied voltage (- 40 db) 0.2 ns at 1 W 0.1 µh maximum: 0.03 µh typical 1.0 pf maximum: 0.5 pf typical < 0.1 ppm/v Operating Temperature Range - 55 C to C Maximum Working Voltage Thermal EMF (5) Weight 300 V, not to exceed power rating 0.15 µv/ C maximum (lead effect) 1.2 g maximum Notes (1) Whichever is lower (2) Heat sink chassis dimensions are requirements per MIL-R-39009/1B: DIMENSIONS inches mm L W H T (3) Inductance (L) mainly due to the leads (4) The resolution limit of existing test requirement (within the measurement capability of the equipment, essentially zero ) (5) µv/ C relates to EMF due to lead temperature difference TABLE 3 - PERFORMANCE SPECIFICATIONS (1) MIL-PRF TEST OR CONDITION MIL-PRF TYPICAL R MAXIMUM R Low temperature storage 24 h at - 55 C ± 0.3 % ± % (10 ppm) ± % (20 ppm) Dielectric withstanding voltage 300 V AC at Atm ± 0.2 % ± % (10 ppm) ± % (20 ppm) Dielectric withstanding voltage 200 V AC at Brm ± 0.2 % ± % (10 ppm) ± % (20 ppm) Insulation resistance > 10 4 M > 10 4 M Low temperature operation ± 0.3 % ± % (20 ppm) ± % (80 ppm) Short time overload 5 x rated power for 5 s (in air) ± 0.3 % ± % (10 ppm) ± % (20 ppm) Moisture resistance + 65 C to - 10 C, 90 RH to 98 RH, 10 days ± 0.5 % ± % (50 ppm) ± % (150 ppm) Terminal strength ± 0.2 % ± % (10 ppm) ± % (20 ppm) Load life 8 W at + 25 C, 2000 h with heat sink ± 1.0 % ± % (50 ppm) ± % (150 ppm) Load life 1.5 W at + 25 C for 2000 h in free air ± 1.0 % ± % (50 ppm) ± % (150 ppm) High temperature exposure C ± 1.0 % ± % (50 ppm) ± 0.01 % (100 ppm) Note (1) Measurement error ± % Document Number: For any questions, contact: foil@vishaypg.com Revision: 16-Aug-12 3

4 TABLE 4 - GLOBAL PART NUMBER INFORMATION (1) NEW GLOBAL PART NUMBER: Y R220T9L (preferred part number format) DENOTES PRECISION VALUE CHARACTERISTICS Y R = 0 = standard 9 = lead (Pb)-free 1 to 999 = custom Y R T 9 L PRODUCT CODE RESISTANCE TOLERANCE PACKAGING 2123 = VPR221SZ T = ± 0.01 % Q = ± 0.02 % A = ± 0.05 % B = ± 0.1 % C = ± 0.25 % D = ± 0.5 % F = ± 1.0 % FOR EXAMPLE: ABOVE GLOBAL ORDER Y R220 T 9 L: TYPE: VPR221SZ VALUE: ABSOLUTE TOLERANCE: ± 0.01 % TERMINATION: lead (Pb)-free PACKAGING: bulk HISTORICAL PART NUMBER: VPR221SZ T 420R22 TCR0.2 T B (will continue to be used) L = bulk R = tape and reel VPR221SZ T 420R22 TCR0.2 T B MODEL TERMINATION OHMIC VALUE T = lead (Pb)-free none = tin/lead TCR CHARACTERISTIC ABSOLUTE TOLERANCE TCR0.2 T = ± 0.01 % Q = ± 0.02 % A = ± 0.05 % B = ± 0.1 % C = ± 0.25 % D = ± 0.5 % F = ± 1.0 % PACKAGING B = bulk T = tape and reel Note (1) For non-standard requests, please contact application engineering For any questions, contact: foil@vishaypg.com Document Number: Revision: 16-Aug-12

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